Metal-scraping apparatus



Oct. 2, 1928;

W. J. STOOP METAL SCRAPING APPARATUS Filed Nov. 24, 1925 4 Sheets-Sheet f/Y w-wraz.

' flrraw/ri 0st. 2, i928.

w. J. STOOP METAL cmm APPARATUS Ei'led Nv. 24, 1925 4 Sheets-Sheet fzgi Patented -ct, 2-, lg

earner tea,

WILLIAM: J'. STOOP, OF WHEELING, WEST VIRGINIA,

METAL-swarms ArrAnAru's.

Application filedNovember 24, 1925. Serial No. 11,241.

This invention relates broadly to metal scraping apparatus, and it has for its pri mary object to provide, in association with a set of reducing rolls, mechanism whereby the surfaces of bars, skelp and similar rolled products or shapes, arescraped for effecting the removal of scale, slivers of metal and like deposits of foreign matter which, rolled into the metal, would result in the production of sheets or other rolled shapes of in- ;ferior quality due to thereby-produced surface pit-tings and imperfections.

A further object is to provide mechanism for scraping from sheet bars and other metal forms flaws and surface imperfections,

thereby greatly to improve the product during hot rolling thereof.

And a still further object is to provide a mechanism of the character mentioned which includes scraper blades which are yieldingly presentedto the surfaces of the advancing material in such manner that not only is the tendency of the blades to chatter eliminated, but also the biting, gouging and cutting of said blades into theadvancing matcrial is prevented.

With these and other objects in view, the invention resides in the features of construction, arrangement of parts and combinations 3 of elements which will hereinafter be fully described, reference being bad to the accompanying drawings, in which- Figure 1 is a partial side elevation of the portion of the invention located at the entrance side of a set of rolls, a power cylinder being-also shown in section; r

Figure 2 is a top plan view of the same,

the roll housings beingshown in horizontal section;

Figure '3 is a face view of the same;

Figure 4 is a section on line 4-4, Fig. 2; Figure 5 is an elevation of the same g iewed from the "side opposite that shown in .ig. 1; Figure 6 is a diagrammatic view illustrating the means for controlling the press H sure to thepower cylinders; I

Figure 7 is a cross sect'on of the trip mechanism; and to Figure 8 is a front elevation of the same.

Referring tosaid drawings, 1 and 2 indicate the opposite parallel housings, and 3 v and 4 the top and bottom rolls, respectively, of a bar mill of the general type with which the present invention is designed to be associated. Mountedin bearings 5* carried by said housings at the entrance side of the mill and at a suitable elevation above the path of movement of bars in entering between said r0lls is a transversely disposed rotary 6 shaft 6; and mounted in bearings 7 located at a suitable lower level than said path isa similar rotary shaft 8. The shaft tiihas' keyed thereon between said bearings the sleeve 'portion 9* of an arm 9 which extends forwardly therefrom and has a downturned front end -10. Rigidly carried on the rear face of said downturned end portion 10 of the arm 9 is a detachable scraper blade 11 having its lower edge projecting somewhat 7 below the corresponding edge, or end, of said arm. Likewise, the shaft .8 has rigidly mounted thereon a forwardly extending arm 12 similar in form to said arm 9, having its forward end 13 upturned and carrying on 7 its rear face a scraper blade 14 which has its upper edge projecting slightly above the level of. the corresponding edge, or end, of said arm 12. Saidblades 11 and 14 are designed to beactuated into pressure-exerting scraping relation to the .top and under surfaces of' sheet bars as the latter are drawn forward, or advanced, through the mill, thereby to effect, by the scraping action, the removal. from said surfaces of any scale, slivers, and

foreign matter which is borne by said sur-' faces and which would otherwise be rolled into the bar in advancing between the rolls. The shaft bearings 5 and 7 are carried by, or formv parts of, a frame structure, desig- .nated generally by the reference character 15, which is attached to and vertically adjustable on the housing 1 and'2, as by means of bolts 16 disposed in slots 17 provided in said hosuings. Said frame includes side .members. 18 which extend forward between P the housings to a point adjacent to the rolls 3 and; 1, and rigidly mounted on the forward ends of said frame members is'a forwardly tapered bar-guide 19 having thereein a horizontally elongated tapered opening :20 throughwhich bars to be rolled are accurately guided in their passage to said rolls Also mounted on said frame rearwardly of the vertical plane in which the shafts 6 and 1 5 v8 are located, and projecting forwardly between said shafts is a bar-guide 2l-similar to the-guide 19 through which the bars to be rolled are guided in their passage the last mentioned guide- I The shafts .6 and 8 are normall held in is fixed intermediate its ends in a subtan-.

positions wherein both scraper bla es 11 and 14 carried thereby are wit path of travel of the sheet bars between the drawn from the guides '19 and 21 'The means by which the shaft 6 is so held comprises a lever 22 which tiall horizontal position upon an endof said sha t and which carries upon its outer end a counter weight 23. Having pivoted connection with-the forward, or inner, end of said lever, as-through the intermediacy of a link 24, is theupper endof a piston. rod 25s which 1 projects outward through the-upper end of a power cylinder 26. Carried by said rod 25 within the cylinder is a piston 27 which normally'occupies a position at or adjacent to the upper end of said cylinder and-which is adapted to be actuated by the admitted pres- 1 sure of compressed air, liquid or steam to of travel. of sheetbars, as

' Openin' I respective y move downward for rocking said shaft 6 and the therebiy ca'rried blade-carrying'arm 9 to substantia ly' the full line position shown in power c finder-28 similar to said cylinor steam pressure employedi as the case may 'throu h b1 d .scri I to a e-carryin into siibstantially the g "shown in Fig; 4, wherein the'blades 11 and be, is admlttedto said c lin ers for actuating the pistons thereof ind h the intermediate .mechanisms dearms. 9 and 12 14am disposedtor seatin I i'n press'ure-ex-' ertmgscraping relation to t e opposite faces of an advancing sheet bar.

and 34 have open communication'wit a pipe '35'leading from a control valve 36 which is opened and closed, asby means of a shiftable control lever 37 to the assage to said ipe 35 0mm pressuiefluid ii-o p m a pressure-s11 pl pi 38. In the closed tion of said vave t e pressure fluid within, the cylinders the gois rmitted to exhaust or escape through an aust pipe 39 leading. from. said valve,

- therebyto permit the pressure actuated parts described to resume theirnormal positions. The movement of the lever 37, of the pmsssu're fluid from controlled, is

a pivoted link, 31 to 'the end ,of'

t of the arnr32, serves normally to.

irections formoving,

pressure-fluid- .to the cylinders. 4 'As hereinbefore indicated, as an advancl hne' positions.

Said ipes 33.

overlying. relation-to the trip lev, the latter is. actuated by. its sprirgg 47.'to resume swm mg 0 efi'ected automatically through theinternriediacy of a trip mechanism 'which includes a trip-lever 40 ivoted intermediateits ends d of the mill below the path on the exit si of travel of the sheet bars. As herein stationary arm 41 carried-by a supporting .shown, said trip lever is pivotally mountedon the innerfend of a rearwardly directed.

bracket 42 which is bolted to the null hous ings. Said bracket also serves as a'support for the lower of two horizontal parallel guide plates 43 and 44 between wh ch the sheet bars are advanced in passingfrom between Y said position, said arm projects'acrossthe guide space located between .the plates 43 and 44, being directed through a slot or opening 45 providedtherefore in the lower plate 43'and into or through a slotzor opening" 46: provided therefor in the-upper late 44.

Said trip lever, which is normally he (1 in the.

position described by means bf a retractile' coil spring-47 attached atone s am the lower arm of the "lever and atits op osite end to a suitable stationary ar't'pf t e structure, as to. a lug 48 carried by the bracket 42 has the end of Said lower arm. connected by a pivoted link, 49 to a lever 50 at a point .inter- 3 mediate the ends of the latter. Said lever" 50 has. its lower end pivotally mountedupon a stationary member, as the bracket-like supporting member 51 mounted on the mill housQ- ings below the bracket 42. Formed on the upper end of said lever 50 is alaterally directed; nger52 which, when said lever 1s rocked rearwardly, is adapted to'enter a formed on the outer end of the operating lever 37 of thepressure control valve-36 wwhich .is suitably supported over saidsup-z pocket 53 port 51, and .to swing said valve to the posi-' tioninwhich it is open to the passage of ing sheet bar emerges from between the rolls of the mill, its front end strikes the upper arm 40"of the trip-lever and forces thelatterto a lowered; position within .the opening 45 wherein the bar passage between the guide plates-4a and 44 is cleared. The Said wered position of 'said trip. lever is maintained throughout the passa of the sheetbar thereover, 'durin -whic time the 'bar scraper blades 11 an 14 are maintainedin scra ingrelation to the facesof said bare passage "of said'pressure duri. time. .When the sheet. bar has from by t e actuating pressure admitted to the" fcglinders by the, valve 36 which is open t 125,

returned to its outwardlyswung position for closing the inlet passage of the valve 36 and for opening valve.

What is claimed is- I 1. A sheet bar scraper comprising a pair the exhaust passage of said of aligned rotary shafts mounted each upon opposite sides of the path of travel of sheet bars to a set of reducing rolls, a forwardly extending arm carried by each of said shafts and havin ends extending inwardly at right an les to t e path of travel of said bars, said en s of the arms forming opposed jaw members, scraper blades carried by said jaw members, and means to rotate the shafts and thereby the arms toward each other and into engagement with said sheet bars whereby to exert a scraping action to remove foreign matter from said bars.

2. A sheet bar scraper comprising a pair of aligned rotary shafts mounted each upon opposite sides of the path of travel of sheet bars to a set of reducing rolls, a forwardly extending arm carried by each of said shafts having ends extending inwardly at right angles to the path of travel of said bars, said ends -of the arms forming opposed jaw members, scraper blades carried by said jaw members, means to rotate the shafts and thereby the arms into engagement with the sheet bars, and means to yieldably hold the arms in engagement with the bars.

3. A sheet bar scraper comprising a pair of aligned rotary shafts mounted each upon opposlte sides of the path of travel of sheet bars to aset of reducing rolls, a forwardly extending arm carried by each of said shafts having ends extending inwardly at right angles to the path of travel of said bars, said ends of the arms forming opposed jaw members, scraper blades carried by said jaw members, means to rotate the shafts and thereby the arms into engagement with the sheet bars, and pneumatic means to yieldably hold the arms in enga ement withthe bars.

In testimony whereo I aflix my signature.

WILLIAM J. STOOP. 

